cl-shellwords

CL-shellwords is a port of Ruby's shellwords.rb to Common Lisp. It can be used to escape strings for use on the (Bourne) shell, or to split command lines into segments according to the shell's escaping rules.

Dependencies

CL-shellwords depends only on CL-PPCRE (BSD). The tests additionally depend on Prove (MIT).

Documentation

CL-shellwords defines the package :cl-shellwords, with the alias :shellwords. This package exports three functions, a condition and an accessor for that condition.

SPLIT

(split string)

Split STRING into a list of words, handling escaping the same way a shell like the Bourne shell does.

Whitespace normally acts as a word separator, except when preceded by a backslash or enclosed in single- or double quotes.

Examples:
(split "example string")
;=> ("example"  "string")
(split "example\ escaped string")
;=> ("example escaped" "string")
(split "example 'escaped string'")
;=> ("example" "escaped string")
(split "example "escaped string"")
;=> ("example" "escaped string")

If STRING contains non-matching single- or double quotes, an error of type UNMATCHED-QUOTE-ERROR is signaled. STRING can be retrieved from the error object using UNMATCHED-QUOTE-ERROR-STRING.

ESCAPE

(escape string)

Escape STRING so that it is safe when used as an argument in a shell like the Bourne shell.

• If STRING is an empty string, a pair of single quotes is returned.
• An LF character is escaped by placing it in single quotes.
• All other special characters are escaped with a backslash.

Examples:

(escape "")
;=> "''"
(escape "It's an example string")
;=> "It\s\ an\ example\ string"
(escape "NothingWrongHere")
;=> "NothingWrongHere"
(escape "{LF}")
;=> "'{LF}'" ({LF} = #\linefeed)

JOIN

(join sequence)

Join the elements of SEQUENCE together, separated by spaces. The elements are first passed to ESCAPE for proper escaping.

SEQUENCE should be a list or vector of strings.

License

Copyright (c) 2015 Joram Schrijver

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.